Abstract

The optical parametric amplifiers (OPA) exhibit such attractive features as broad gain bandwidth and tunability, so they could be easily matched to virtually any of existing sources of ultrashort pulses. The OPA, in contrary to other nonlinear devices such as second-harmonic or sum-frequency generators allow the use of multitude of pump beams with the condition that each of those satisfies the non-collinear phase-matching constraints with a single signal beam. This feature of OPA has. been demonstrated by simultaneous phase­matching of two [1] or three [2] pump beams in order to narrow both spectral and spatial bandwidth of the emitted parametric superfluorescence.

© 1998 IEEE